APA Citation

Gamma, E., Helm, R., Johnson, R., & Viissides, J. (1995). Design patterns: Elemets of reusable object - oriented software. Boston: Addison - Wesley.

Chicago Style Citation

Gamma, Erich, Richard Helm, Ralph Johnson, and John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.

MLA Citation

Gamma, Erich, Richard Helm, Ralph Johnson, and John Viissides. Design Patterns: Elemets of Reusable Object - Oriented Software. Boston: Addison - Wesley, 1995.

Warning: These citations may not always be 100% accurate.